What cleaning products are safe to use on the HP Z420 Workstation chassis?

For light stains or dirt, use plain water with a clean, lint-free cloth or swab. For stronger stains, use mild dish washing liquid diluted with water and rinse by wiping with a water-dampened cloth. For stubborn stains, isopropyl (rubbing) alcohol can be used, and no rinsing is required as it evaporates quickly. Never use solvents or flammable solutions to clean the computer. (Page 39)